53115481 has 2 divisors, whose sum is σ = 53115482. Its totient is φ = 53115480.

The previous prime is 53115473. The next prime is 53115511. The reversal of 53115481 is 18451135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31539456 + 21576025 = 5616^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 53115481 - 2³ = 53115473 is a prime.

It is a super-2 number, since 2×53115481² = 5642508643722722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53115451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26557740 + 26557741.

It is an arithmetic number, because the mean of its divisors is an integer number (26557741).

Almost surely, 2^53115481 is an apocalyptic number.

It is an amenable number.

53115481 is a deficient number, since it is larger than the sum of its proper divisors (1).

53115481 is an equidigital number, since it uses as much as digits as its factorization.

53115481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 28.

The square root of 53115481 is about 7288.0368412900. The cubic root of 53115481 is about 375.9011948962.

The spelling of 53115481 in words is "fifty-three million, one hundred fifteen thousand, four hundred eighty-one".